GB0521248D0 - Optical communications - Google Patents

Optical communications

Info

Publication number
GB0521248D0
GB0521248D0 GBGB0521248.5A GB0521248A GB0521248D0 GB 0521248 D0 GB0521248 D0 GB 0521248D0 GB 0521248 A GB0521248 A GB 0521248A GB 0521248 D0 GB0521248 D0 GB 0521248D0
Authority
GB
United Kingdom
Prior art keywords
tsk
encoded signal
moems
mdash
pulses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
GBGB0521248.5A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qinetiq Ltd
Original Assignee
Qinetiq Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qinetiq Ltd filed Critical Qinetiq Ltd
Priority to GBGB0521248.5A priority Critical patent/GB0521248D0/en
Publication of GB0521248D0 publication Critical patent/GB0521248D0/en
Priority to PCT/GB2006/003884 priority patent/WO2007045872A1/en
Priority to JP2008536120A priority patent/JP2009512890A/en
Priority to EP06794825.7A priority patent/EP1946465B1/en
Priority to US12/090,317 priority patent/US8135286B2/en
Priority to CNA2006800385050A priority patent/CN101292449A/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/112—Line-of-sight transmission over an extended range
    • H04B10/1123—Bidirectional transmission
    • H04B10/1125—Bidirectional transmission using a single common optical path

Abstract

Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting —received TSK pulses so as to transmit an on-off keying (OOK) signal wherein modulation is achieved by operating a micro-opto-electronic mechanical system (MOEMS) device having a oscillation period, the difference in timing between logic 1 and logic 0 pulses of the TSK encoded signal being such that each pulse arrives at a time within a single MOEMS device oscillation period chosen to ensure high or low transmissivity through the MOEMS device independent of incident TSK encoded signal pulse value (0 or 1).
GBGB0521248.5A 2005-10-19 2005-10-19 Optical communications Ceased GB0521248D0 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GBGB0521248.5A GB0521248D0 (en) 2005-10-19 2005-10-19 Optical communications
PCT/GB2006/003884 WO2007045872A1 (en) 2005-10-19 2006-10-19 Method of providing duplex optical communications and optical modulator therefor
JP2008536120A JP2009512890A (en) 2005-10-19 2006-10-19 Method for providing dual optical communication and optical modulator therefor
EP06794825.7A EP1946465B1 (en) 2005-10-19 2006-10-19 Method of providing duplex optical communications and optical modulator therefor
US12/090,317 US8135286B2 (en) 2005-10-19 2006-10-19 Method of providing duplex optical communications and optical modulator therefor
CNA2006800385050A CN101292449A (en) 2005-10-19 2006-10-19 Method of providing duplex optical communications and optical modulator therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0521248.5A GB0521248D0 (en) 2005-10-19 2005-10-19 Optical communications

Publications (1)

Publication Number Publication Date
GB0521248D0 true GB0521248D0 (en) 2005-11-30

Family

ID=35458267

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB0521248.5A Ceased GB0521248D0 (en) 2005-10-19 2005-10-19 Optical communications

Country Status (6)

Country Link
US (1) US8135286B2 (en)
EP (1) EP1946465B1 (en)
JP (1) JP2009512890A (en)
CN (1) CN101292449A (en)
GB (1) GB0521248D0 (en)
WO (1) WO2007045872A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8204384B2 (en) * 2008-11-21 2012-06-19 Cubic Corporation Phase-modulating communication device
JP2011106936A (en) * 2009-11-17 2011-06-02 Seiko Epson Corp Spectrum measurement apparatus and analyzer
JP5919728B2 (en) 2011-10-26 2016-05-18 セイコーエプソン株式会社 Spectrometer
WO2013116208A1 (en) * 2012-01-30 2013-08-08 Unipixel Displays, Inc. Method and system for free space optical communication utilizing a modulated electro-optical polymer retro-reflector
JP6098051B2 (en) 2012-07-04 2017-03-22 セイコーエプソン株式会社 Spectrometer
CN102983904B (en) * 2012-12-05 2015-09-09 合肥鼎臣光电科技有限责任公司 Based on free-space method system and the means of communication thereof of modulating retroreflective device
EP3298704A1 (en) * 2015-05-18 2018-03-28 Politecnico di Milano Apparatus for transmitting signals based on reflections and related method
TWI695197B (en) * 2019-09-06 2020-06-01 國立臺灣科技大學 Bidirectional optical wireless transmission system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558025B1 (en) 1984-01-10 1987-05-22 Thomson Csf LINKING SYSTEM FOR SIMULTANEOUS TWO-WAY FIBER OPTIC TRANSMISSIONS
GB2196809B (en) * 1986-10-23 1991-05-22 Plessey Co Plc Optical communication system
LU87164A1 (en) * 1987-12-15 1988-08-23 Siemens Ag REFLECTION TRANSMITTER FOR A BIDIRECTIONAL FOC COMMUNICATION SYSTEM
FR2682239B1 (en) 1991-10-04 1994-11-04 Cit Alcatel BIDIRECTIONAL TRANSMISSION SYSTEM, IN PARTICULAR BY OPTICAL FIBER, WITH A SINGLE CARRIER FOR BOTH WAYS OF TRANSMISSION.
US6778779B1 (en) 1999-12-15 2004-08-17 New Mexico State University Technology Transfer Corporation Full-duplex optical communication system
US7149256B2 (en) 2001-03-29 2006-12-12 Quellan, Inc. Multilevel pulse position modulation for efficient fiber optic communication
US6577242B2 (en) 2001-05-04 2003-06-10 Pittway Corporation Wireless transfer of data from a detector
US20030142741A1 (en) * 2002-01-30 2003-07-31 Rf Saw Components, Incorporated Modulation by phase and time shift keying and method of using the same
US7729030B2 (en) * 2002-10-21 2010-06-01 Hrl Laboratories, Llc Optical retro-reflective apparatus with modulation capability
GB2418028B (en) 2003-05-07 2007-08-01 Qinetiq Ltd Dynamic optical reflector and interrogation system
US6999163B2 (en) * 2003-07-28 2006-02-14 Harris Corporation Embedded moems sensor for fluid dielectrics in RF applications
US6839172B1 (en) * 2003-11-15 2005-01-04 Manouchehr E. Motamedi Enhanced sampling rate in time domain imaging using MOEMS scanning optical delay line

Also Published As

Publication number Publication date
WO2007045872A1 (en) 2007-04-26
EP1946465A1 (en) 2008-07-23
US20080260380A1 (en) 2008-10-23
EP1946465B1 (en) 2014-06-18
US8135286B2 (en) 2012-03-13
CN101292449A (en) 2008-10-22
JP2009512890A (en) 2009-03-26

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)